Jewellery, Watches and Objects of Vertu to include the personal archive of Louis Osman, goldsmith and architect

An emerald and diamond floral hoop brooch, by Tiffany & Co, the circlet composed of alternating cinquefoil flowerhead clusters of round-cut emeralds and trefoil clusters of brilliant-cut diamonds, all claw set in yellow gold, signed and stamped ‘18k’, brooch diameter 39mm. £500-700